凸凹|でこぼこdekoboko[0]heiban (flat)

JLPT N2approx.Common
とつおうtotsuouだくぼくdakubokuok
Definitions
  1. no-adjective, na-adjective, suru verb, intransitive verbunevenness; roughness; ruggedness; bumpiness
    バスはでこぼこ道みちを走はしりながらガタガタと音おとを立たてた。↗
    The bus rattled as it drove along the bumpy road.
  2. no-adjective, na-adjectiveinequality; imbalance; unevenness; difference
Conjugation
Dictionary form凸凹する(でこぼこする)
Polite (masu)凸凹します(でこぼこします)
Negative (nai)凸凹しない(でこぼこしない)
polite (masen)凸凹しません(でこぼこしません)
classical zu / nu凸凹せず・凸凹せぬ(でこぼこせず・でこぼこせぬ)
Past (ta)凸凹した(でこぼこした)
polite (mashita)凸凹しました(でこぼこしました)
Past negative (nakatta)凸凹しなかった(でこぼこしなかった)
polite (masen deshita)凸凹しませんでした(でこぼこしませんでした)
Te form凸凹して(でこぼこして)
Potential凸凹できる(でこぼこできる)
Passive凸凹される(でこぼこされる)
Causative凸凹させる(でこぼこさせる)
Causative passive凸凹させられる(でこぼこさせられる)
Conditional (ba)凸凹すれば(でこぼこすれば)
tara凸凹したら(でこぼこしたら)
Volitional凸凹しよう(でこぼこしよう)
polite (mashou)凸凹しましょう(でこぼこしましょう)
Imperative凸凹しろ(でこぼこしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonym凹凸おうとつWrittenWritten/formal prose word for unevenness, often describing terrain or surfaces; 「凸凹」 is the more colloquial choice and also covers figurative imbalance.
  • RelatedギザギザNeutralRead 「ギザギザ」 here: it means jagged, serrated notches, while 「凸凹」 is uneven rises and dips. 「刻々」 is normally read 「こくこく」 and refers to the passage of time.
  • Antonym平坦へいたんNeutralNeutral antonym on the flatness axis: level, even ground, the opposite of a 「凸凹」 surface.
  • Antonym平滑へいかつWrittenWritten/formal prose antonym on the flatness axis: describes a surface that is flat and smooth, the opposite of 「凸凹」.

Use 「凸凹」 for bumpy roads and uneven surfaces, and figuratively for imbalance; it leans colloquial. In written prose prefer 「凹凸」. For jagged, serrated edges use 「ギザギザ」. Antonyms: 「平坦」 for level ground, 「平滑」 for smooth surfaces.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 表面ひょうめんが出でたり引っ込ひっこんだりしており、平たいらでないさま。でこぼこ。
Kanji in this word
English equivalents
See also

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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